.contenu1 {

width: 800px; /*largeur maxi*/
/*height: 460px;*/
margin: 0px auto;
/*background-color:#ffffff;*/
background-color:#8be4ff;
border: ridge 6px;
}


.bloc1 {
margin-left: 5px;
width: 170px;
float: left;
/*border: solid 1px;*/
}


.bloc3 {
width: 170px;
float: right;
margin-top: 168px;
/*border: solid 1px;*/
}

.bloc2 {
position: relative;
margin-left: 255px;
margin-right: 175px;
/*border: solid 1px;*/
}


.pied {
font-size: 12pt;
font-weight: bold;
text-align: center;
clear: coth;
}